Gruta de São Thomé: The Cave That Named a Town

Gruta de São Thomé is a 20-meter-long quartzite cave tucked beside the main church in the historic center of São Thomé das Letras, and it costs nothing to enter. According to local legend, the town's name comes from a statue of Saint Thomas found inside this small grotto — and the rock paintings above its entrance gave the "das Letras" (of the letters) part of the name. A visit takes about 10 minutes, but the view from the top of the cave, known as A Toca, is what most travelers remember.

Location and How to Get There

Where the cave sits in town

The cave is on Alameda V.a Martins, immediately next to the Igreja Matriz de São Thomé, a church built in 1785. The historic center around it was listed as a heritage site by IEPHA in 1996, so you are walking through protected streets of quartzite blocks. If you stand in front of the church, the cave entrance is to the side — you cannot miss it because it looks like a short tunnel with two openings.

Driving and bus access

Most visitors arrive by car from Três Corações or Cruzília via the LMG-862 and LMG-868 state roads, which are paved and in good condition. From Belo Horizonte the drive is about 280 km, from São Paulo roughly 340 km, and from Rio de Janeiro around 400 km. Long-distance buses run to São Thomé das Letras from São Paulo (departing around 15:00, arriving about 21:30), but for BH and Rio the connections are awkward — a car or shared van is more practical. Once in town, everything in the center is walkable; leave the car near the Praça Barão de Alfenas.

Parking and orientation

The cave has no dedicated parking lot, and the streets around the church are narrow and often full on weekends. I usually park a few blocks downhill and walk up — it takes five minutes and saves the stress of squeezing into a spot. The tourist information point near the main square can confirm current access if you are unsure.

What You Will See Inside

The grotto and its altars

The interior is short, dark, and low in places. A small altar holds an image of São Thomé (Saint Thomas), often decorated with candles and flowers left by visitors. The passage curves and exits onto a narrow lane on the other side, so you can walk through rather than backtrack. It is not a deep cave — 20 meters total — and on a busy weekend the line to enter can feel longer than the visit itself.

Rock paintings and the legend

Above the entrance, faded prehistoric paintings are one explanation for the town's name. The most famous story says a runaway enslaved man named João Antão hid in this grotto and was given his freedom papers by a mysterious figure; when he returned with his owner, only a statue of Saint Thomas remained. Whether or not you buy the legend, the cave is treated as a sacred site by locals, and you will often see people praying quietly inside.

The staircase to A Toca viewpoint

The real payoff is above the cave. At the back right side there is a staircase leading to the top of the rock formation, called A Toca, where you get a panoramic view of the town's stone streets and the surrounding Serra da Mantiqueira. Sunset from here is excellent — the town faces west — but the steps are uneven and unlit, so bring a phone light or headlamp for the descent. Most people spend more time at the viewpoint than in the cave itself.

Practical Tips for Your Visit

Opening hours and cost

The cave is free and, according to most sources, accessible 24 hours a day with no ticket office or gate. Some listings mention an 8:00–18:00 window, but in practice you can enter whenever the center is open. There is no guided tour — it is self-guided, and a visit lasts 5 to 10 minutes, or 20 if you climb to the viewpoint. Bring a small flashlight or use your phone; the interior lights are often off.

What to wear and bring

Wear sneakers or trail shoes — the stone streets are slippery when wet, and the staircase to the top is rough. Light, layered clothing works year-round: days are mild but nights can drop below 10°C in winter (June–August), and even in summer evenings are cool at 1,440 meters of altitude. A headlamp is better than a phone for the cave, and a reusable water bottle is useful because there are few shops right at the cave entrance.

When to go and how long to stay

Weekdays are far quieter than weekends, when the center fills with day-trippers. The dry season from May to September brings clearer skies and safer trails, making it the best time for the viewpoint and nearby waterfalls. I would not plan a whole day around the cave — combine it with the church, the stone streets, and a waterfall like Vale das Borboletas or Véu de Noiva. If you are in town for three days, the cave fits naturally into a morning walking tour of the historic center.

Frequently Asked Questions

Is Gruta de São Thomé free to enter?

Yes, entry is free and there is no ticket or reservation needed. Some sources list an 8:00–18:00 schedule, but the cave is generally open 24 hours with no gate, so fees and hours are subject to change — check locally if you plan to visit at night.

How long does a visit take?

The cave itself takes about 5 minutes to walk through, and climbing to the A Toca viewpoint adds another 10 to 15 minutes. Most visitors spend 15 to 20 minutes total, including photos.

Can I climb to the top of the cave?

Yes, a staircase at the back right side leads to the top, where you get a panoramic view of the town. The steps are uneven and unlit, so bring a flashlight and wear shoes with grip.

What is the best time of day to visit?

Late afternoon is ideal if you want the sunset from the viewpoint, but the cave is small and can get crowded on weekend afternoons. Weekday mornings are the quietest.