Bell Stone, Mountain summit in Serra da Mantiqueira, Brazil.

Pedra do Sino is the highest point of Serra dos Órgãos National Park, at 2,275 metres, in the municipality of Guapimirim, Rio de Janeiro state. The summit lies within the Serra do Mar, about two kilometres north of Dedo de Deus. The 11–12 km trail from the park headquarters in Teresópolis, at 1,100 metres, passes two waterfalls, a paved stretch from the Imperial era and four sheltered rest stops, the last a small hut near the top.

The summit marks the highest point of Serra dos Órgãos National Park, in the municipality of Guapimirim, Rio de Janeiro state. The trail from the Teresópolis park headquarters follows part of an old paved path from the Imperial period, and the peak is also the final stretch of the traditional Petrópolis–Teresópolis crossing.

The peak's name, Pedra do Sino ("Bell Stone"), comes from the bell shape of its rock. The final stretch of the Petrópolis–Teresópolis traverse ends here, and hikers often sleep at the Abrigo or camping area to watch the sunrise above 2,000 m. In winter, a thin layer of ice often coats the vegetation at dawn.

The climb is demanding and requires sturdy hiking boots, plenty of water, and weatherproof clothing for temperature changes. Visitors should start early in the day and check conditions before hiking, as weather can change quickly at this elevation.

The summit lies in Guapimirim, while the 11 km trail starts at the Teresópolis park headquarters at 1,100 m; access is capped at 100 people per day. The trail is also the final stretch of the Petrópolis–Teresópolis crossing.