Tiwanaku's Semi-subterranean Temple: 175 Faces in a Sunken Court

The Semi-subterranean Temple at Tiwanaku holds 175 carved stone heads set into its walls, no two alike. This sunken courtyard sits about 1.7 meters below ground level and measures roughly 28.5 by 26 meters, making it one of the oldest monumental structures at the UNESCO World Heritage site, located 70 kilometers west of La Paz at an altitude near 3,870 meters.

What Makes the Semi-subterranean Temple Unique

The temple's design is deceptively simple: a rectangular pit, slightly trapezoidal, with walls made of alternating stone pillars and smaller blocks. What sets it apart is the decoration. The 175 heads embedded in the walls are carved from different types of stone — andesite, sandstone, limestone — and vary widely in size and expression. Some wear headbands, others have animal features, and a few appear to represent mythical beings. Archaeologists interpret them as depictions of ancestors or representatives of different social groups that made pilgrimages to Tiwanaku. The effect is uncanny: wherever you stand in the courtyard, dozens of faces watch you from the walls.

The 175 Stone Heads

The heads were not originally part of the walls. Most were found scattered during excavations and later reinserted into the reconstructed walls. Each head is unique — a detail that becomes obvious only when you walk close and compare. Look for the one with a wide, almost grinning mouth on the south wall; it's a favorite among guides. The stone used varies from reddish sandstone to gray andesite, suggesting they were brought from different quarries, possibly as offerings from distant communities.

The Bennett Monolith and the Barbado Monolith

The courtyard's center holds two monoliths. The larger one, the Bennett Monolith, stands 7.3 meters tall and was discovered here in 1932 by archaeologist Wendell C. Bennett. It depicts a standing figure with a staff, snakes along its sides, and pumas with human faces on its skirt. The monolith was moved to La Paz in 1932 and only returned to Tiwanaku in 2002 after years of protest by local Aymara communities. The smaller Barbado Monolith (the "Bearded One") is a 3-meter sandstone sculpture of a spiritual leader with hands on chest and belly, fox heads on either side of its head, and snakes and pumas carved on its body. Both are original pieces, not replicas.

The Sunken Courtyard and Its Acoustics

The courtyard's depth — about 1.7 meters — is not just structural. Standing at the bottom, you notice how sound behaves: voices carry clearly across the space, but the surrounding walls block the wind. This likely enhanced the temple's function as a place for communal rituals. The temple faces south, the only structure at Tiwanaku with a southern entrance, and its staircase originally framed the Quimsachata mountains to the north — a visual alignment that was later blocked when the Akapana pyramid was built.

Practical Tips for Visiting the Semi-subterranean Temple

The Semi-subterranean Temple is included in the main Tiwanaku ticket, which costs 100 bolivianos (about $14.50 USD) for foreign visitors and covers the archaeological site plus both museums. Hours are generally 9:00 to 16:00 daily, though some sources list 8:00 to 17:00 — confirm locally, as hours can change. The site is entirely outdoors, so come prepared for high-altitude sun and sudden temperature shifts.

Best Time to Visit and What to Bring

The dry season from May to October offers clear skies and the most comfortable conditions, with daytime temperatures ranging from 10°C to 20°C (50–68°F). June and July are the coldest months, with nighttime temperatures near freezing. The temple is at its most atmospheric in the early morning, when the low sun casts shadows on the carved faces. Bring sunscreen (SPF 50+), a hat, sunglasses, and water — the altitude makes dehydration easy. Also carry small bills in bolivianos, as credit cards are not accepted for the ticket.

How Long Should You Spend at the Temple

The Semi-subterranean Temple itself takes 20 to 30 minutes to explore thoroughly, but it's part of the larger Tiwanaku complex. Allow at least 1.5 to 2 hours for the main site (Kalasasaya, Gate of the Sun, Akapana pyramid) and an additional 1 to 1.5 hours if you plan to visit the museums and Puma Punku. A half-day trip from La Paz is common, but if you want to see everything without rushing, plan for a full day.

Accessibility and Photography

The temple is accessed via a staircase or a ramp, but the courtyard floor is uneven packed earth and stone. Wheelchair access is limited. Photography is permitted throughout the site, but tripods and professional equipment require advance permission. The faces on the walls are best photographed in the morning light; by afternoon, the sun is directly overhead and the shadows become harsh.

How to Get There and What to Expect

The Semi-subterranean Temple is part of the Tiwanaku archaeological complex, located 70 kilometers (about 1.5 to 2 hours by road) from La Paz. The most straightforward option is a guided day tour, which typically departs La Paz between 7:30 and 8:30 AM and returns by late afternoon. Tours include transport, a bilingual guide, and often lunch; prices range from 90 to 130 bolivianos for the tour alone, plus the 100-bolivianos entrance fee. Independent travelers can take a minibus from La Paz's Cemetery District (Zona del Cementerio) to Tiwanaku for about 20 bolivianos each way; the ride takes 1.5 to 2 hours. From the Tiwanaku crossroads, taxis wait to take you the final few kilometers to the site. Buses also run from the El Alto terminal.

Guided Tour vs. Independent Visit

A guide adds real value here. Without one, the sunken courtyard can seem like a pile of stones with faces; with a guide, you learn which heads were placed where, what the monoliths represent, and how the temple fit into Tiwanaku's ritual calendar. If you go independently, consider hiring a local guide at the entrance (expect to pay around 100–150 bolivianos for a group). The site's signage is sparse and in Spanish only.

Combining with Other Sites

The Tiwanaku ticket includes the Ceramic Museum and the Lithic Museum, both worth a stop before or after the temple. The Lithic Museum houses the Bennett Monolith's original location display and other carved stones. Puma Punku, about a kilometer away, is also covered by the same ticket; its precision-cut H-blocks are a stark contrast to the Semi-subterranean Temple's rough stone. Most tours combine all these in one loop.

Altitude and Health Precautions

At 3,870 meters, altitude sickness is a real concern. Spend at least two days acclimatizing in La Paz before visiting Tiwanaku. Symptoms like headache and shortness of breath are common; take it slow, drink coca tea, and avoid alcohol the night before. The site has little shade, so sunburn and dehydration are more immediate risks than altitude sickness for most visitors. Carry a lip balm with SPF and reapply often.

Frequently Asked Questions

How much does it cost to enter the Semi-subterranean Temple?

The entrance fee is 100 bolivianos (about $14.50 USD) for foreign visitors, 15 bolivianos for Bolivian nationals, and 5 bolivianos for Bolivian schoolchildren. The ticket covers the entire Tiwanaku archaeological site, including the Semi-subterranean Temple, Kalasasaya, Akapana, Puma Punku, and both museums. Fees are subject to change — check the official site for current rates.

What are the opening hours?

The site is generally open daily from 9:00 to 16:00, though some sources report 8:00 to 17:00. Hours can vary, especially outside the dry season, so confirm locally before you go. The last entry is typically 30 minutes before closing.

Can I visit the Semi-subterranean Temple without a tour?

Yes. Independent travelers can take a minibus from La Paz's Cemetery District to Tiwanaku for about 20 bolivianos each way, then walk or take a short taxi ride to the site. However, a guide is recommended to understand the carvings and history, as signage is minimal. Local guides can be hired at the entrance for around 100–150 bolivianos.

Is the temple accessible for people with mobility issues?

The courtyard is accessed via a staircase or a ramp, but the floor inside is uneven and unpaved, making it difficult for wheelchairs. The site's high altitude and rough terrain also present challenges. Visitors with limited mobility should consider viewing from the rim rather than descending into the courtyard.